1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262691776299a225f622b408ce6fed64edb049be38b1f2a1acdd891377e26a3c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6afd25b6-8bc7-4c2e-ba80-af3311ecdc55.json and https://artists.proofprofile.net/proofs/artist/6afd25b6-8bc7-4c2e-ba80-af3311ecdc55.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bc0f5f02cb95f88523781ddd35a286deb66ff3681c55dac5096958d53908cc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMFV2000282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b36498ac5e64aed8c30a4b46b0a67f247dc93a26ab17d2a2f5b3d60d4d5ad4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2143768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd57d1d399fa9efd5cad4ac6b95967cf36fbbdac2a2dc2ca14f192247437cda2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2239988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fe8fdf3f210e4e70fe6374fe58609464de5dd294fb691a9aeae828d2358dfa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2219735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085950d957a0f7248348cde65dcee688e86dc732d4612e9cf46f4481b132ce5b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2273001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1e0e802894383f7e5fd96981282e2d6ed94c0e5f79f46314b303c6b10e34db. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2273002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00898e8962fa08b580ba5003bd66003814285eb78f1574965856d6d65b51d84c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2273003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3010aa86ed67fb4f75edbb008ce92727ea95f50cffdc6fb306876116820a2aee. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2273014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0474d0fc214945b7d1248b454e4cb5b76e5b260279443676d3931460466a01a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2256187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31753bb085db794c57a6c55e1d6bae55c3766230aff2a34fea95fe3826ad548. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2273006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007a30463b93dac2e902a3f7aba9ce2c129f8c1d12895bb8ccd876ce61dbfec8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2273007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ed462df7e4ea970811df1171fcdaa09407579b4933fcdffdc825200403c987. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2273008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54007b8e64159801914a7e2534fc17d8c110e9817c18432f87b4a5aa7e2da977. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2273009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54ff8f79ff232a092f0f5539fb10c27c58d123e159375d8139565b66c535b20. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2273010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b73920e16e0cf67b33cd5ee2f6b61bfea03073dbcf389cb768d0cf28de820b2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2273011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6182c113166d115624cd2ec4315524897eacddb6814eadb14cf089636b1e5380. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2241307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2207abb2e1b04198b750b434252e96a2c5da6d4341eba945f6fa39852cf832f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2234182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4260c4db776ef271b2df70e9c8ef2aa1f3b31058b312e59e160f091ea333076f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2122954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08afaf98ec9390ef8df7583c782fc02dc3f91e0e93ee5d67653e74fa82032b5b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2130814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43345dd3d067f27033687dd8ed43f644d77e63331a655e7591f2c2e266ba881. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2114686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad49ca80efb1a6c0dda87f316ed61cc2bb8c214077b34ec0a7377dac768aec7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2139128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370e77d5c7780229ff25e0cc6082b8797277506d9eec6d38ad46242db1ca4326. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2139129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464ef400df7f495a6ef5e470eb519fd1fa4e6011142bd6e94b96dfd356861aca. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2139131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375fa48e34e51c5ad6f54b0f1c45dfa720e72103141c7c6efba911d11ff58fe7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2139132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf52197d8164d536b2e9b5c057c2703d317a2a7c51a2babb8b3febdfea92de9f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2139133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11853e90143cbeaea2adb90b07798464cc5e5641d368de9d0d18172d5f229aa1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2139134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fe746ff0fbacf82e8dda80e77fba930c27c6dc60127db47f6175c0000f6573. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2139135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d444e9f79e77f694316f9ce68ac69a210cee00dc9f7c7284192e134e1f33e1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZY5J2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639e3443910ea7269993dbfd1939899492b63be2bcf60ac9b043ddb24df95c08. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2399423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52405abf99076129d8f7dd5711735e0a1547ac8ee88c1ba7455a9f6e4886f11e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZJJE2310013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb36ae437e58aa18fa5b9a591913a4d3381833202da0b893a7570b121067d394. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2270436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5e1bc242a5c098a4908fb8df65db75cd642ad6323509f7eace3fd9238f0126. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2270431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afa7f52f13f7bb844da8982e18613486c9e8829da35e8200912b147b4a5150a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2213106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0474d0fc214945b7d1248b454e4cb5b76e5b260279443676d3931460466a01a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2256187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e014bd38112f3c9861661063c8a19df48235e52d397715de24cdff42fab52a8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2243592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6182c113166d115624cd2ec4315524897eacddb6814eadb14cf089636b1e5380. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2241307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2207abb2e1b04198b750b434252e96a2c5da6d4341eba945f6fa39852cf832f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2234182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315ea839802e35c6a3c9b8b46e4e44f59090fe5306b30a4130f0b90f7070d0a4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2190951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0346e262a514dc1bf7405583032e92ebe0ee8bebee0b14bef3e506ab88be261. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF012100317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08afaf98ec9390ef8df7583c782fc02dc3f91e0e93ee5d67653e74fa82032b5b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2130814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4260c4db776ef271b2df70e9c8ef2aa1f3b31058b312e59e160f091ea333076f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2122954.